Telephone meter-service system.



G. A. YANOCHUWSKI. TELUHONE METER SERVICE SYSTEM. MPucmon man sm. 2. w15.

1,263,013. Patented Apr. 16, 1918.

2 SHEETS-SHEET l.

i? JMIMMMHW G. A. YANOCHOWSKI. TELEPHONE METER SERVICE SYSTEM. APPLICATION msn SEPT. 2. 191s.

1,263,013. Patented Apr.16,1918.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GEORGE A. YAIIOCHOWSXI, OF CHICAGO, ILLINOIS, ASSIGNOB. TO AUTOMATIC ELECTRIC COMPANY, OF CHICAGO, ILLINOIS. A CORPORATION OF ILLINOIS.

TELEPHONE METER-SERVICE SYSTEM.

Speflincation of Letters Patent.

Patented Apr. 16, 1918.

Application illeil September 2, 1915. Serial No. 48,613.

r., To all whom t may concer-n:

lie it known that 1 (iranien YANG ciiowsni` a citizen of the United States of America, and a resident4 of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in 'lclephone Meter-Service Systems, of which thc following is a specification.

y invention Mates to registers for telephone s vstcms, and more particularly to a type of register which may be used in conncctioii with an automatic telephone system for recording the actual length of time during which a linc is in use for conversation.

Registers ot' the above character may be located citiier at thc subscribers substation or at the exchange. rllie preferable mode ot' construction provides a spring operated register which is normally locked. When the called subscriber answers, the register associated with the calling line is unlocked and continues to `run during the conversatioii.'atter which it is again locked and remains inoperative until another call is iliade.

The object ofiny invention is the provision of improved means for controlling registers of the above4 general character. In carrying out my invention, I employ in connection with each register a marginal un locking relay normally inoperative but which may be rendered active by an increased flow of current'. brought about when the called subscribpr answers.

A. further object of' my invention is the modification ot automatic apparatus in such a inanncr that an increased current can be sent. at. the proper time through the aboveinentioncd controlling relay` 'lo accomplish the foregoing and other nsct'nl ends iny invention comprises means which will be hereinafter fully explained, reference heilig had to the accompanying drawings.

A[n the drawings, Figures 1 and 2, taken in order with the lilies at. the ends, thereof through the medium of the individua-l line -switch C, the selector switch E, and the conin alineinent. represent a complete circuit connectionl between a calling substation A and a called substation A in a system enibodying the principles of my invention. 'llie said connection has been established `line switches o general type of substation shown in British patent to T. (i. Martin, #1419 of 1910. As herein represented it consists of the receiver 2, transmitter 3, receiver hook 4, ringer 5, and condenser 6. Being an automatic substation it is also provided with a pair of impulse springs S' and 9 controlled by the impulse wheel 7 through the medium of a linger hole dial (not shown).

The line conductors 13 and 14 of the substation A are connect ed at the exchange to the individual line switch C which is of the general type disclosed in British patent to R. 1V. James, #26,301 of 1906; being, however. of the partcula r type shown in United States Letters Patent #13901, reissued Apr. 13. 1911". to Frank Newforth, Jr. The line switch comprises among other details a plunger (not shown) attached-to the end of a so called plunger arm 34. The plunger arm 34 and the cut off armature 35 are controlled by the magnet 52 which has two windings: one of which. the pull in winding 33, operates both the plunger arm and the armature 35; while the other, the holding winding 82, is only strong enough to operate the cut ott' armature and to hold the plunger arm in an operated position after 1t has been operated by the pull in winding. When the ilunger arm is operated, the plunger is orecd ilito a bank of Contact springs, forcing the springs 44, 45, 46, and 47 into engagement with contacts 48. 49, 50, and 51, respectively. Although only one setI of springs and contacts (44 to 51, inclusive) is shown, it is understood that each line switch is provided with a plurality of such sets, each set forming the terminal of a trunk line leading to a selector switch. Each trunk line is connected in multiple with the corres onding springs of all the i) the group which is controlled bythe master switch D. The line switch C is controlled by the subscriber through the medium of the line relay 31.

The master switch D is of the general. type disclosed in British patent to R. W. James, #26,801 of 1906; being, however, more nearly of the particular type disclosed in British patent to T. G. Martin #1,419

of 1910. The function of the master switch, as is well known, is to maintain the plungers of all the idle line switches in position bev fore the terminal of an idle trunk line.

Accessible to the line switch C is shown a ios 35` is of the general type of connector switchv selector switch E, which is the Ugeneral type of selector switch disclosed in nited States Letters Patent #815,321, granted March 13,`

1906, to Keith, Erickson, and Erickson; except that the so called side switch is omitted, and the circuits are modified to enable the switch to operate in a system in which the central oflice ap aratus is controlled by iinpulses deliveredp over the two sides of the line in series, as shown in British patent to T. G. Martin #10,376 of 1912. Among other details the selector E comprises a bank of gontacts arranged in horizontal rows or levels, which contacts are adapted to be engaged by a set of wi ers 70, 71, and 72 carried upon a shaft not shown) which has a vertical movement controlled by the vertical ma net 60, and a rotary movement controlled y the rotary magnet 61. The operation of the various parts of the switch is controlled through the medium of the doiible wound line relay 64. Means for permitting the. switch tobe restored to normal position is provided in 'the release magnet 68, which, upon energizing, withdraws the retaining pawls from the shaft. The contact 76 is closed only when the shaft has been raised one or more steps from its lowest position. The relays 67 and 69 are slow-acting, that is, they retain. their armatures for an instant after their energizing circuits are broken.

The selector switch E has access to a number of connector switches, one of which is shown at H (Fig. 2). This connector switch disclosed in United States Letters Patent #815,176, granted March 13, 1906, tov Keith, Erickson, and Erickson; the circuits being modiiied, `however, to enable the switch to operate in a system in which the central ofiice apparatus is controlled by impulses delivered overA the two sides of the line in series. Among other details the connector H comprises a bank of contacts arranged in horizontal rows or levels, which contacts are adapted to be engaged by a 'set of ipers 140, 141, and 142 carried upon a shaft (not shown) which has a vertical movement controlled by the vertical magnet 109, and a ro- 4tary movement controlled by the rotary magnet 110., The usual side switch compriising the wipers 116, 117, 118, and 119 ,is controlled by the private magnet 113 in the wellkno`wn manner. The operation of the 'various parts of the switch is controlled through the medium of the double wound line relay 100, whichalso servesto supply talking current to the calling line. The called line is provided with talking current by means of the double wound answering bridge relay 103. The ringing relay 115, affords means for projecting ringing cur- 'rent over the called line to signal the called` subscriber. Means for permitting the. switch to be restored to normal position is provided in the release magnet 107 which, upon energizing, withdraws the retaining pawls from the shaft. The contacts 147 and 148 close only when the shaft has been raised one or more steps from its normal position. The relay 106, controlled by the answering bridge relay 103, is peculiar' to my invention and its function is to provide the increased current flow for the operation of the calling subscriber-s register. The relays 108 and 1.12 are slow-acting, that is, they retain their armatures for an instant after their energizing circuits are broken.

.`he individual `line switch C is similar to line switch C and is controlled along with a number of other line switches by a master switch lsimilar to the master switch l).

The substation shown at A is in all respects similar to the substation A.

For supplyingoperating and talking current I have shown at B a battery having the positive terminal grounded. For supplying an increased current to certain circuits I have shown at l a booster battery having its negative terminal grounded. l have shown a generator (l 1115 for supplying ringing current and an interrupter I for intermittently operating the ringing relay. .it T l have shown a: busy'signaling machine.

At M I have shown a time registering mcchanis which is associated with, and is located near the substation A. At M I have shown a similar time register associated with the substation A, but which is located at the central exchange. Mi and M2 represent similar time registers whichare associated with the substation A' anda-Inch are located at the substation and 'at the rontral exchange, respectively. In actual rpractice it is improbable that more than one time register would be supplied for each substation; but since the location of theti'me register may depend upon circumstances, and since the method of control is somewhat dii'erent'in the different locations, l have preferred to show two time registers herein associated with each substation in order to more clearlyshow the adaptability of my invention to lvarious conditions.

Referring now to the time registering mechanism shown at M (Fig. 1), the time piece l( is shown only diagrammatically, as it may be of any suitable construction, such for instance,4 as an ordinary spring driven clock-movement. lt should, however, be, capable of registering the maximum total `time for which4 the telephgne is apt to be used during a somewhat extended period, say, for instance, a month. The time piece K is controlled by themagnet 15, in series with line conductor14, through the medium magnet l5 is shunted by thil nozrinductive winding 1G in order to provirhl a better path for talkingcurrents.

Referring now to the time registering mechanism M', the time piece li. and all other parts except the magnet 2l are similar to the corresponding parts ol the register M. The magnet; itl. has one terminal joined to a terminal of the holding winding ft2 of the line switch at spring l5. and thiA other terminal isA conmwzted to the spring il,

whereby, upon the operation ol line switch C, it is connected to the ungrounded termi` nal of battery B.

e time registers M3 and M2 are connected similarly to the time registers M and M". respectively. l A

Having given a general description of the apparatus, I will now describe the opcration of a system embodying the principles of my invention, There will first be explained the method by which a calling subw station A may establish a connection with the substation Af; after which there will he made clear the method by which the time registers M and M, associated with the call ing substation. A, are controlled, Inasnna-h, as the automatic apparatus shown herein i.-: Well known in the art, having been fully described in the publications above referred to, its operation will be described. in a general Way, the details being given only where they have to do with the operation ot my invention. l'

Referring now to Fig. l, the sul'iscriber at substation A, upon removing his receiver to initiate a calli, completes an energizing circuit -for the line relay 31 ofthe line switch C over the following path: ground at G2, Contact springs 39 and 3S, line eoni'luctor 13, contact springs QS and 27 of substation A, impulse springs S and 9, receiver 2, trans mittel' 3, winding of magnet ifi and non-inductive resistance 1G in parallel. .line con doctor 14, contact springs 30 and 37, and Winding of line relay 3l to hz'ititery B. The .line relay is energized over the above circuit and, upon attracting its armature, eomgletes a circuit for the pull in winding 33.--

he pull in winding; upon energizing, attracts the plunger arm 34 and the cut oil armature 35; the former, by means of its plunger, forcing the springs 44--47 inclusive into engagement, respectively, with contacts 4S-5L inclusive; aml the latter disconnecting the line comluctors 13 and ll from ground and battery. respectively, by separating contart springs its and 55, and 36 and 37.

By the engagement ol' springs tf1 and 47 with contactsiltt and 5l ,i respeirtirely` the line conductors 13 and l-t are extended to the double wound line relay Gt of the selector E. The line relay is thereupon energized over the previously traced circuit through sub station A and completes a circuit from ground at G* to the slow-acting relay 67. Relay 67. upon energizing, completes a holding riet-uit extending back to the line switch (l over the following path: ground at G, contact' springs T8 and 77, contact 49, spring 15. holding winding 32 to battery B. Although the circuit of the line relay 31 has alreadybcen broken, it retains its armature long enough to allow the above holding eircuit to he established. A branch of the holding circuit may now be traced from spring l5. through ma net Q4 of time register M and by way oI spring 41 and Contact,` 40 (closed with the plunger arm 34 in an'o erated position) to battery B. However, t, e current flow in magnet 24 is insufficient to4 operatively energize it at this time. A second brai` 4l1 of the -holding circuit extends over wire 30 to multiple test contacts in the banks of connectors having access to the line of substation A where, by a ground potential on these test contacts, the said line is made busy.

rlhe foregoing operations have all ocem-ri-d in response to the removal of the receiver from the hook. The subscriber at substation A may now operate his dial in arronlance with the first diUit of the desired number, thereby breaking time continuity of hisloop a number of times, and at the same time short circuit-ing the receiver, transmitter, and magnet 15 by means of contact springs 25 and 26 and conductor 10. As a result of these interruptions the line relay loo (i4 is detnergized a ,corresponding number 4 ot times, sending an impulse at each denergization from ground at G* to the slowaeting relay (it) and the vertical magnet 60 in series. The vertical magnet, in response to these impulses, steps up the shaft until the wipers stand opposite the horizontal level in which are located contacts which are ter ininals of the desired group of connectors. The relay (t9, being slow-acting, retains its armature during the series of impulses and closes a circuit for the test relay G2, which relay locks itself to ground at G". At the rend of the series of impulses the relay (it) detinergizes, thereby closing a circuit for the rotary magnet (i1, whereupon the wipcrs 70, 7 l and 72 start rotating in search of a trunk extending to an idle connector. As is well known, the rotary magnet interrupts its own circuit, and also the looking circuit of the test relay at every energization, the contacts rirouited by the test wiper 71 while passing over busy or grounded test contacts. As soon, therefore, as the test wiper reaches an ungrounded test Contact the test relay 62 falls back and opens the rotary magnet'crcuit, thereby bringing the wipers to rest upon the contacts of an idle connector H. The relay 62, upon denergizng, completes in the latter circuit, however, heilig short a circuit for the line switching relay 63 which latter, upon energizing, disconnects the line conductors 18 and 1.4 from the line relay 64 and extends them, by Way of wipers 70 and 72 and bank contacts 73 and 75, to the line relay 100 of the connector H.

The line relay 100 thereupon energizes over the previously traced circuit through substation A and completes a circuit from ground at G to the slow-acting relay 108. Relay 108, upon energizing, completes a new holding circuit as follows: ground at G7, contact springs 150 and 151, contact springs 128and 127, bank contact 74, wiper 71, to contact spring 79, where the circuit divides,

y one branch extending, by way of contact spring 80 and winding of line switching relay 63, to battery B, andthe other branch extending, by way of off normal contacts 81 and rotary armature contacts 82, to contact spring 77, where it joins the previously described holding circuit and provides a holding ground for the line switch C after the re ays 64 and 6T have denergized.

The subscriber at substation A may now operate his dial in accordance with the second digit of the desired number, resulting in this' case in denergizations of the line relay 100 of the connector H. At each denergization the line relay sends an impulse from ground at G m the vertical magnet 109 in series with relay 112, side switch wiper 116 being in its irst position. The vertical magnet, in response to these impulses, steps up the shaft until the wipers 140, 141, and 142 stand opposite the `horizontal level of contacts 1n which are located the contacts individual to substation A. y rlhe relay 112, being slowacting, retains its armature during the series of impulses and maintains a circuit from ground at G9 to thc private magnet 113. At the end of the series of impulses the relay 112 and the private magnet 113 denergize, the latter controlling the side switch Vwipers in the usual manner to advance them .to then' second positlon.

'The subscriber at substation A may now operate his dial in accordance with thethird and `final digit of the desired number, rcsulting as before in denergizations of the line relay 100. In this case, however, side switch wiper 116 being in its second position, the line yrelay sends im ulses to the rotary magnet 110 in series with relay 112, 55`

whereby the wipers 140, 141, and 142 are rotated until they rest upon contacts 143, 144, and 145, respectively, these contacts bein `individual to substation A'. -The relay 11 andthe private magnet 113 are oper-` ated as before, whereby the side switch :wipers are advanced to their third position. As slide 'switch wiper 119 `cornes into its third osition a circuit is completed from groun at Glf, by way of wiper 141 and bank contact 144, the holding winding 32" of line switch C', thereby `ittracting the cut off armature 35 and discmnectin the lines of substation A from round an battery B. Ground at G1 is a so extended to multiple contacts similar to contact 144 in other connectors of the group thereby makin the line of substation A busy to other ca ls. By the engagement of side switch wipers 117 and 118 with their third osition contacts, the line conductors 14 an 13 are extended to the wipers 140 and 142, respectively, thereby completing the connection between the two substatons. By the engagement of side switch wiper 116 with its third position contact, a circuit is completed for the ringing relay 115 in series with the interrupter I, whereby ringing current is 'projected intermittently out over the line of scriber at substation A; and how, at the termination of the conversation, the operation of these mechanisms is stopped.

It has been explained how the magnet 24 of register M has one terminal connected to battery B and the other connected to the holding circuit, which has been grounded first at G and later at G", the current iow being insuliicient, however, to operatively energize magnet 24. It is clear also that the magnet 15 of register M, being in series with line conductor 14, has taken current successively in series with line relays 31, 64, and 100. These line relays are all wound to a high enough resistance, however, to reduce the current iiow to a point where the magnet 15 will not be operatively energized.

Now when the subscriber at substation A removes his receiver from the hook a circuit is completed for the double wound answering bridge relay 103, which relay serves to supply talking battery to substation A. Relay'103 upon energizing, completes a circuit for the rin cut-011' re ay 114 which locks up and brea s the circuit of the ringing relay 115, thereby sto ping the intermittent ringing. As a furt er result of the energization of rela 103, a circuit is closed for the' relay 106 w ich clrcut may be traced as follows: ground at G1side switch wiper 119 in third position, windin of relay 106, and contact springs 130 an 131 to battery B.

Relay V106, upon energizing, brings about circuit changes which result in the operation of magnets 15 and 24 of the registers M and M.

We will consider first the circuit change caused by the shiftingof the contact spring 127 from contact spring 128 to contact spring 120. This results in inserting the booster battery B in the holding circuit in sucha manner that its voltage 1s added to that of battery B, the com lete circuit for magnet 24 now being as fol ows: ground at G, resistance 155, negative pole of battery B', positive pole of battery B', contact sprin 129 and 127, bank contact 74, wiper 71, o normal contact 81, contacts 82, contact 49, spring 45, winding of magnet 24, contact spring 41, contact 40, ne ative'pole of battery B, positive pole of attery B, ground at G', to ground at G11 the starting point. The increased current How due to the increased voltage enables ma net 24 to attract its armature, whereupon t e escapeme'nt is freed and the time piece K begins As side switeh'wiper 119 leaves its third poruiming.

The circuit eii'ectin the 'operation of magnet 15 of register IVI is brought about bythe engagement of contact springs 124 and 126 with contact springs 123 and 125, respectively. By this operation the retardation coil 120 is connected in parallel with Winding 101 of line relay 100, and retarda; tion coil 121 is connected in parallel with winding 102 of line relay 100. Since the combined resistance of the parallel circuits above-mentioned is considerably less than the resistance of the windings of line relay 100 alenean increased current will flow in the winding of magnet Magnet 15 thereupon attracts its arma ure and frees the escapement of the timepiece K, which also starts running. I

The registers will continue to operate as long as both receivers remain oil'. Should the called subscriber hang up, the circuit of the answering bridge relay is broken and it deinergizes, thereby breaking the circuit of relay 106. Relay 106, upon denergizing, breaks the circuits for causing an increased current flow iii magnets 15 and 24, whereupon these magnets retract their armatures which again engage the escapements of their respective time ,pieces and make them inoperative. Should the calling subscriber hang up fiist,the circuit of the line relay 100 and the magnet 15 are broken at thesame time. As a result the time register M? is stopped at once by the denergization of ,magnet 15. The denergization of line relay 100 results in the restoration of the automatic apparatus to normal in the well-known manner.

sition the circuit of relay 106 is broken and said relay denergizes, whereupon magnet 24 retracts its armature and the time registenM is stopped. y

In calling a rbusy line it is well known that the side switch wipers of a connector i of the type shown are locked in their second position to prevent connection with the called line and to facilitate the application of the busy tone to the calling line. It follows then that 4the answering bridge relay 103 and the relay 106 cannot be enrrgized and the time registers will not bestarted.

It has been mentioned before thatl ix all probability but one time register wot ld need to be employed in connection nitheach substation. In case it is desired to locate the time registers at their res ective substations as the time register is located, the contact springs 127, 128 and 129 of the relay 106 may be omitted on all the connectorsand also the battery B' may be omitted. In case circumstances make it more convenient to install the time registers at the exchange. the contact springs 123, 124, 125, and 120. and the retardation coils 120 and 121 nniy be omitted on all the connectors, and the i line relays of the various switches may be of such time registers is enabled to compute the total elapsed time of a large number of separate conversations. While I have de scribed in the foregoing certain specific embodiments of my invention, I do not. wish to be held strictly to the forms shown her-cin. for various modifications will no doubt. suggest themselves to those skilled in the art. I desire, therefore, to include all foi-ms and modifications of my invention which may come within the scope of the appended claims.-

What I claim as my invention is:

1. In combination, a line, a time registering mechanism associated with said line, u Second line, means for connecting said lines. controlling means for said register in said first line, a source of current for said lines, means for changing thc current strength in said first line to operate said controlling means, automatic release means for said 'connecting means. a circuit for said release means, said circuit separate from the tulle ing circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

2. In combination, a line, u second line, a source of current for said lines, means for connecting said lilies, a time registering mechanism having a controlling relay in said first line, said controlling relay irresponsive to normal current in said line, means for increasing the current `strength in said first line to operate said controlling relay, automatic release means for said connecting inenns, u circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a, circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

3. In combination, a line, a time registering mechanism having a controlling relay in series with said line, a second line, means for connecting said lines, a, source of current Jr'or said lines, means controlled over said second line for changing the current strength in said first line to operate said controlling relay, automatic release means for said connecting means, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

4. In combination, a line, a-timc registering mechanism associated with said line, a second line, means for connecting said lines, controlling means for said register in said rstline, a source of current for said lines, means controlled over Said second line for changing the current strength in said irst line to operate said controlling means, automatic release means for said connecting means, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, Said last circuit extending over the release circuit and controlled by said current changing means.

5. In combination, a line, a second line, a soui'ce of current for said lines, means for connecting said lines, a time registering mechanism having a controlling relay in said first line, said controlling relay irresponsivc is; normal current in said line, means connolled over said second line for increasing the current stren h in said first line to operate said controlling relay, automatic release means for said connectin means, a circuit for said release means, sai circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release Vcircuit and controlled by said current changing means.

6. In combination, a line, a normally `locked time registering mechanism associated with said line, controlling means in said line for said register, a second line means for connecting said lines, a source ci current for said lines, means for changing the currcnt'strcngth in said lirst line, whereby said controlling means is operated to unlock said register, automatic release means for said connecting means, a circuit for said release means, said circuit separate from the talking circuit, another time re istering mechanism, a c ircuit for said ot er mechanism, said last circuit extending over the release circuit and controlled by said current chan 'ng means.

7. In com ination, a line, a normally locked time registering mechanism associated with said line, controlling means in said line for said register, a second line, means for connecting said lines, a source of current for said lines, means for changing the current strength in said first line, whereby said controlling means is operated to unlock said register, means for relooking said register upon ling means, automatic release means for said connecting means, a circuit for said release means, said circuit separate from the talking circuit, another time registeringl mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

8. In combination, al line, a time registering mechanism associated with said line, a second line, an automatic switch accessible to said first line for extendin a connection to said second line, contro ling means for said register in said first line, a source of current for said lines, means for changing the current strength in said lirst line to operate said controlling means, automatic release means for said switch, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changin means.

9. In combination, a ine, a second line, a source of current for. said lines, an automatic switch accessible to said first line for extending a connection to said second line, a time registering mechanism having a controlling relay in said lirst line, said controllin relay irresponsive t`o normal current in sai( line, means for increasing the current strength in said first line to operate. said controlling relay, automatic release means for said switch, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

10. In combination, aline, a time registering mechanism having a controlling relay in series with said ine, a second line, an automatic switch accessible to said first line for extending a connection to said sccond line, a source of current for said lines. means controlled over said second line for changing the current stren h in said first line to o crate said control ing relay. automatic re ease means for said switch, a circuit for said release means, said circuit septhe release of said controlarate from the talking circuit, another time registerin mechanism. a,l circuitJ for said other mec anisni. said last circuit extending over the release circuit and controlled b r said current changing means.

11. In combination, a line, a time registering mechanism associated with said line, a second line, an automatic switch accessible to said first lille for extending a connection to said second line, controlling means for said register in said first line, a source of, current for said lines, means controlled over said second line for changing the current Strength in saidfirst line to operate said controlling means. automatic release means for said switch, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release -circuit and controlled by said current changing means.

12. In combination, a line, a second line. a source of current for said lines, an automatic switch accessible to said first line t'or extending a connection to said second lim a time registering mechanism having a controlling relay in said first line, said control- A ling relay irresponsive to normal current in said line. means controlled over said second line for increasing the current strength in said first line to operate said controlling relay. automatic release means for said switch, a circuit for said release means, said circuit separate from the talking circuit. another time registering mechanism. a circuit for said other mechanism, said last circuit extending;r over the release circuit and controlled by said current changing means.

1o. In combination, a line, a normally locked time registering mechanism associated witn said line, controlling means in said line for lsaid register. a second line. an au` toniatic switch accessible to said lirst line for extending a connection to said second line,

a source of current for said lines. means for changingr the current strength in said first line, whereby said controllingmeans is oper' ated to unlock said register,` automatic release means for said switch, a circuit'. for said release means. said circuit separate from the talking circuit.- another time registering mechanism. a `circuit for said other mechanism, said last circuit extending over-the release circuit and controlled b y said curi'ent changing means 4 14. In combination` a line. a noi-mall)v locked time registering mechanism associated with said line,controllin means in said line for said register, a secoin line. an anto matic switch accessible to said lirst line for extending a connection to said second line. a Source of current for Said lines, means t'or changing the current strength in said lirst liiie, whereby said controlling means is operated to unlock said register. means for relocking said register upon the release of said controlling means. automatic release means for said switch, a circuit for said release means. said circuit separate from the tulk- 70 ing circuit. another time registering mechanism. a circuit. for said other mechanism, said las( circuit extending over the release circuit' and ront rolled by said current changing means.

15. In combimition, a liuc, a time regist n'- ing mechanism associated with said line, a second line. means `for connecting-said lines, controlling means for said register in said first line. a source ot' current for said lines, 80

a rela)Y in said connecting means. means for changing the current strength in said `first line to operate said controlling means, said changing means comprising a shunt for said relay. aulonnuic release means for said conneet ingr means. a circuit for said release meansaid circuit separate from the talking circuit. another time registering mechanism, a circuit i'or said other mechanism, saidllast circuit extending over the. release circuit and said 925 said changing other time registering mechanism, a circuit 106 for said other mechanism, said last circuit extending over the release circuit and controlled bj.- said current changing means.

17T. In combination, a line, a normally locked time registering mechanism assocx- 110 ated with Said line, controlling means in said iine for said register, a second line, means l'or connecting said lines. a source of current for said lines, a relay in said connecting strength in `said first line` whereby said controlling means is operated to unlock said register. `said changing means comprising a shunt t'or said relay. automatic releasemeans .means means for changing the current t'or said connecting means, a circuit foi-Said 120 release means. lsaid circuit separat/e fromy the talkingy circuit` another time registering ineclmnisni. n circuit for said other mechanism. said last circuit cxtendingover the release circuit and controlled by said Current 126 changing means.

lts. ln combination, a line, a normally* locked time registering mechanism associ- V'in ated with said line, controlling means in said line for said register, a second line, means for connecting said lines, a source of current for said lines, a relay iii said connecting means, means for changing the current strength in said first line, whereby said controlling means is operated to unlock sai register, means for relooking said register upon the release of saidA controlling means, said changing means comprising a .shunt for said relay, automatic release means for said connecting means. a circuit for said release means, circuit, another me registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means. 19. In combination, a line, a time registerg mechanism associated with said line, a second line, an automatic switch accessible to said lirst line for extending a connection to said second line, controlling means for said register in said first line, a source o current for said lines, a relay in said switch, means for changing the current strength in said first line to operate said controlling means, said changing means comprising va shunt for said relay, automatic release means for said switch, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said cur-ent changing means. 20. In combination2 a line, a time registermechanism associated with said line, a second line, an automatic switch i ,said first line for extending a connection means,

an automatic switch accessible ond line,

to said second line, controlling means for said register in said first line, a source of current for said lines, a relay in said Switch, means controlled over said second line for changing the current strength in said first line to operate said controlling means, said changing means comprising a shunt for said relay, automatic release means for said switch, a circuitV for said release said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means. 21. In combination, a line, a normally locked time registering mechanism associated with `said line, controlling means in saidline for said register, a second line, to said first line`for extending a connection to said seca source of current for said lines, a. relay in said switch, means for changing the current Strength in said first line, whereby said controlling l lock said register, said changing means comrising a shunt for said relay, automatic reease means for said switch, a circuit for said said circuit separate from the talkingr accessible to.

means is operated to unrelease means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

22. 1n combination, a line, a normally locked time registering mechanism associated with said line, controlling for said register, a second line, an automatic switch accessible to said first line or extending a connection to said second line, a source of current for said lines, a relay in said switch, means for changing the current strength in said first line, whereby said controlling means is operated to unlock said register, means for relocking said register upon the release of said controlling1 means,-

said changing means comprising a s unt for said relay, automatic release means for said switch, a circuit for said release means, said circuit separate. from the talking circuit, another time registcring mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

23. In combination, a line, a time registering mechanism havingr a controlling relay in series with said line, a second line means for connecting said lines, a source of current for said lines, a second relay in said connecting means, means controlled over said second line for changing the current strength in said first line to operate said current changing means. ill. In combination, a line, a time registering mechanism having a controlling relay in series with said line, a second line, an automatic switch accessible to said first line for extending a. connection to said seccontrolling ond line, a source of current for said lines,`

a second relay in said switch, means con trolled over said second line for changing the current strength in said first line to operate said controllingr relay, said changing means comprising a shunt for said ysecond relay, automatic release4 means for said switch, a circuit for said release means, said circuit separate from the talking circuit, another tiine registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.`

25. In combination, a line, a second line, a source of current for said lines, means for connecting said lines, a relay in said con necting means, a time registering mechaextending 'a connection to :,aaapia nism having a controlling relay in said first line, said controlling rc ay irresponsive to normal current in said line, means for increasing the current strength in said first line to operate said controlling relay, said increasing means comprising a shunt for said first relay, automatic release means for said connecting means, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism. said last circuit extending over the release circuit. and controlled by said current changing means.

26. In combination, a line, a second line, a source of current for said lines, means for connecting saidlines, a relay in said connecting means, a time registering mechanism having a controllin r relay in said first line, said controlling re ay irresponsivc to normal current in said line, means controlled over said second line for increasing thc current strength in said first lille te operate said controlling relay, said increasing means comprising a shunt for said first relay, automatic release means for said connecting means,a circuit for said release means, said circuit separate from thc talking circuit., another time registering ineclianism, a circuit for said other mechanism, said last circuit extending over the release circuit and coutrolled by said current changing means.

27. In combination, a line, a second line, a source of current for said lines, an automatic switch accessible to said first line for extending a connection to said second liuc, a relay in said switch, a time registering mechanism -having a controlling relay in said first line, said controlling relay irresponsive to normal current in said line, means for increasing the current4` strength in said first line to operate said controlling relay, said increasing means comprising a shunt for said first relay, automatic release mealis for said switch, a circuit for said release means, said circuit separate from the talking circuit. another time registering mechanism, a circuit for said other 'mechanism, said last circuit extending over the releae circuit and controlled by said current hanging means. y

28. In combination, a line` a second line, a source of current for lsaid lilies, an automatic switch accessible to said rst line for said second line, a relay in said switch, a time registering mechanism having a controlling relay in said first. line. said controllin sponsive to normal current in said line, means controlled over said line for increasing the current strength in said first line to operate said controlling relay, said incrcasin r means comprising a shunt for said first re ay, automatic release means for said switch, a circuit for said release means, said vfor said registering relay irrecircuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled said current changing means. 29. In combination, a line, a time registering mechanism associated With said line, a second line, means for connecting said lilies, a circuit included in said connecting means which includes a controlling relay mechanism, a source of current for said lines and for said circuit, means for changing the current strength in said circuit to operate said controlling relay, automatic release means for said connectin means, a circuit for said release means, sai circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said lastacircuit extending over the release circuit and controlled by said current changing means.

30. In combination, a line, a time registering mechanism associated with said line, a second line, means for connecting said lines, a source of current for said lines, a circuit in said connecting means including a controlling relay for said mechanism, said controlling relay irresponsive to normal current in said circuit, means for changing` the current strength in said circuit to operate said controlling relay, automatic release means for said connecting means, a circuit for said release means, said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

In combination, a line, a normally locked time registering mechanism associated with said line, a second line, means for connecting said lines, a circuit in said connecting means which includes a controlling relay for said registering mechanism, a source of current for said lines and for said circuit, means for changin the current strength in said circuit, where said controlling relay is operated to unloc t said registering mechanism, automatic release means for said connecting means, a circuit for said release means, said circuit separafte from the talking 32. In comb -a line, a normall locked time registering mechanism associated with said line, a second line, means for connecting said lines, a circuit in said connecting means which includes a controlling relay for said registerin mechanism, a source of circuit, means strength in Said trolling relay is for changing the current circuit, whereby said conoperated to unlock said regcurrent for said lines, and for said iat rio

lIL() istering mechanism, means for relooking said registering mechanism upon the release of said controlling relay, automatic release means for said connecting means, a circuit for said release means, said circuit separate from the talking circuit, another time registeringr mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled by said current changing means.

33. In combination, a ine, a time registering mechanism associated with said line, a second line, an autom-atie switch associated with said iirst line for extending,r a connection to said second line, a circuit associated with said switch which includes a controlling relay for said registering mechanism, a source of current. `t'or said lilies and for said circuit, means for ehangiiig the eurrcnt strength in said circuit to operate said controlling relay, automatic release means for said switch. a circuit tor said release said circuit separate from the talking circuit, another time registering mechanism, a circuit for said other mechanism, said last circuit extending over the release circuit and controlled h v said current changing means.

3i. In combination, a line, a time, registering n'iechanism associated with Said line, a second. line. an automatic switch associated with said first line tor extending a connection to said second line. a source ot current for said lines. a circuit associated with said switch including a controlling relay tor said register. said controllin; l relay irresponsire to normal current in said circuit, means tor changing the. current` strength in ,said circuit. to operate said controlling` relay. auton'iaticr4 release means l'or said switch` a circuit t'or said release means.` said circuit separate trom the talking circuit. another time registering mechanism. a circuit ter said other mechanism, said last circuit extending over the release circuit and ontrolled by said current changing means.

35. ln combination, a line, a normallyI locked time registi-rine mechanism associated with Said line. a second line, an automatic switch associated with said first line t'or extending a connection to said second line` circuit associated lwith said switch which includes a controllingI relay tor said registering mechanism, a source of current for said lines and for said circuit. means l'or changing the current strength in said circuit. whereby said controlling rela),1 is operated to unlock said registering mechanism. automatic ro lease means for said switch, a circuit for said release means, said circuit, separate. trom the talking circuit, another time registering mechanism` a circuit, for .said other mechanism, said last circuit extending over the release circuit and controlled by said currentl changing means.

36. ln combination, a line, a normally locked time registering mechanism associate with said line, a second line, an automatic switch associated with said lil-st. line tor extending a connection to said second line, a circuit associated with said switch which includes a controllingrelay tor said registering mechanism. a source oi current 'for sai lines` and for said circuit, means for changing the current strength in said circuit, whereiny said controlling relay is operated to unlock said registering mechanism. means for relocking said registering mechanism upon the release of said controlling relay, autrmiatie release means tor said switch. a circuit for said rela-ase means. said circuit separate from the talking circuit. another time registering nu-chanism. acircuit lor said other mechanism. said last circuit extending over the release circuit and con trolled by said current changing means.

3T. in combination, a line. a time registering mechanism associated with said line. a second line` means lor connecting said lines, controlling means for said register in said first line. a .source of current l'or said-lines, and a relay for changing' the current` strength in said first line to operate said controlling means. automatic release means for said connecting.;r means. a circuit tor sa'u release means. said circuit separate fromthe talking circuit. another time registering mechanism` a circuit t'or said other mechanism. said last circuit extending over the release circuit and controlled b r said relay.

litt. ln combination. a line. a second line. a source ot' current lor 4said lines. means tor connecting said lines. a time registering mechanism haring a controlling relay in said tirst line. aid controlling relai' irresponsiul to normal current iu `aid line. and a relay t'or increasing the current strength in said lirst line to operate said controlling relay. automatic release means for said connecting means. a circuit lor -said rehase means. said circuit .separate lrom the talking circuit, another time registering mechanism` a circuit l'or said other mechanism. said last circuit, extending o\er the release circuit and controlled by said relay.

35i. ln combination. a line` a time registering mechanism haring a controlling relay in series with said liuc. a second line. means` for (,:onnecting said lines. a source ot current t'or said lines. aml a relay controlled over said second line lor changing the current strength in said lit-sl. line to operate said controlling relay` automatic release means for said connecting means. a circuit for said release, means` said circuit separate t'rom the talking circuit, another time registering mechanism` a circuit t'or said other mecha.- nisrn. said last circuit. extending over the release circuit and controlled by said relay.

40. In combination, a, line, a normally me for said register, means for connecting said ines, a source of current for said lines` and a relay for changing the current strength in said first line. whereby said controlling means is operated to unlock said register, automatic release said connectingmeans, a circuit for said release means, said circuit separate from the talking circuit, another time regis` tering mechanism, a circuit for said other mechanism, said last circuit extending over the re ease circuit and controlled by said relay.

41. In combination, a line, a time registering mechanism associated with said line. a second line, means for connecting said lines. a circuit included in said connecting means which includes a controlling relay for said registering mechanism` a source of current for saidlines and for said circuit, and a relay for changing the current strength in means, a circuit for said release means. said circuit separate from the talking circuit, another time registering mechanism, a circuit for 'said other mechanism, said last cir cuit extending over the release circuit and controlled by saidrelay.

42. In combination, a line, a time registering mechanism associated with said line. a second line, means for connectin lines, a source said lines, a circuit in said connecting means including a controlling relay for sald mechanism, said controlling relay irresponsive to normal current in said circuit, and a relay changing the current strength in said circuit to operate said controlling relay, automatic release means for said means. a circuit for said release means, said separate from the another time registering mechanism, cuit for said other mechanism, said last circuit extending over the release circuit and controlled by said relay.

43. In combination, a line, a normally locked time registering mechanism associated with said line,` a second line, means for connecting said lines, a circuit in said current strengt said controlling relay is operated to unlock said registering,mechanisim automatic re lease means for said connecting means, a circuit for said release means, said circuit separate from the ,talking circuit, another time mtu-ins, and

connection from a relay in said other switch means responsive to the operation of said relay for operating lsaid registering mechanisms.

45. `i1 combination. a calling line. a called `suhscrihens line, means for es-i tab ishing a talking circuit hetwcm said a time registering device individual to the calling suhscrihcfs line, another registering associated i a relay controlled b subscriber for operating.,r both otysaid mechanisms.

46. ln combination, a line, a time registering mechanism for said line, an automatic switch individual to said line, another time registering mechanism for said switch,

mechanisms, by

4T. n combination, a calling subscribei"s line. a called lsubscribers line, means for estahlishing'a talking circuit hetweensaid lincs. a time registering device individual tothe calling subscribers line, another time registering device associated with said means, and a rel'iiy Acontrolled by the called subscriber for operating both o 4 said mechanisms one over thc talking` circuit and the other over a circuit independent of said talking circuit.

In combination, a calling subscribers called subscrihers line, means for esa talking circuit between said lines. a time registering. device individual to the calling' subscribei"s line, another time registering device associated with said means. and a relay controlled the called subscriber for operating both of said mechanisms, one h v an incr-cased How of current over thc talking circuit and the other by an increased llo of current over a circuit independent of' thc talking circuit.

Signed b v mc al (`hicago, (.ook county.

lliliois. .this 20th day of AUitrust, 1915.

subscribers iis 

